{"product_id":"acl-race-rod-bearing-set-bmw-m3-e36-3-2l-s50b32","title":"ACL Race Series connecting rod bearings for BMW M3 E36 3.2L S50B32","description":"\u003cp\u003eThese ACL Race Series connecting rod bearings, reference 6B1497H, are for the BMW M3 E36 3.2L S50B32. They are the standard choice when opening the engine for performance upgrades.\u003c\/p\u003e\u003cp\u003eInternally, they feature three layers on a high-strength steel backing: a copper-lead-tin lining, a thin nickel barrier, and a lead-tin-copper sliding layer, which is the one that works against the crankshaft. In connecting rod bearings, the surface layer is thinner to better withstand fatigue.\u003c\/p\u003e\u003cp\u003eACL manufactures them with more \"crush\" (housing interference) than a standard bearing to ensure they are held securely and dissipate heat better, and with more eccentricity, which helps them maintain the oil film when the housing deforms at high RPMs.\u003c\/p\u003e\u003cp\u003eIn standard size, ACL specifies them for a connecting rod journal of 48.975 to 48.991 mm, with a bearing width of 18.0 mm. For that diameter, they recommend an oil clearance of about 0.052 to 0.062 mm, measured with a micrometer and bore gauge. If the crankshaft has been reground, the dimensions change.\u003c\/p\u003e\u003cp\u003eThey do not have the final silver tin plating of standard bearings, so their dark color—ranging from brown and black to bluish—is factory-standard and does not indicate any defect. ACL advises against polishing the bearing surface to adjust clearance; if more is needed, they are combined with the HX version, which provides 0.025 mm of additional clearance.\u003c\/p\u003e\u003cp\u003eBefore ordering, please confirm the measurement of your crankshaft (standard or reground); if you have any questions, write to us with your engine code.\u003c\/p\u003e","brand":"ACL","offers":[{"title":"Default Title","offer_id":50813076668750,"sku":"ACL-6B1497H-STD","price":198.54,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/7329\/0062\/files\/acl-m3-e36-32l.jpg?v=1735903590","url":"https:\/\/driftandgrip.com\/en\/products\/acl-race-rod-bearing-set-bmw-m3-e36-3-2l-s50b32","provider":"Drift \u0026 Grip","version":"1.0","type":"link"}